Global Warming Notes 3

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National Geographic Causes:
  • Greenhouse gases
  • Fossil fuels (cars, factories, and electricity production)
  • Carbon Dioxide
  • Methane released from landfills and agriculture especially from animal digestive systems
  • 1 molecule of methane= 20 times the amount of greenhouse gases in 1 molecule of Carbon Dioxide

National Geographic Effects:
  • melting glaciers and ice
  • animals are on the move because of change in temperature

Best CO2 eliminating trees native to this area
  • Black Walnut
  • White Pine
  • Red Oak
  • Douglass Fir
Black Walnut
  • Can grow to be 70 feet tall and just as wide at the top.
  • Dark brown, nearly black bark
  • ridges in more mature trees
  • wood used as gunstocks, cabinets, and veneer
  • ligth green before ripe, at this time emits brown die which is difficult to remove from hands.
  • husk is hard two halved shell
  • inside husk is walnut
Eastern White Pine
  • Leaves: Clusters of 5 in leaves. Spell w-h-i-t-e
  • Fruit: Cones 5"-8" long, slightly curved, no prickles, each scale usually bears 2 winged seeds.
  • Bark: at young age greenish-brown. Later becomes grooved, scaly, dark brown.
  • Height: ranging from 50'-90'. Original Pennsylvania Pines were 150' and more.
  • one of most valuable timber trees
Northern Red Oak
  • Leaves: Alternate, 4"-9" long 6" wide 5 points
  • Fruit: acorns, kernal is bitter. Need two seasons to ripen.
  • Bark: Smooth Grey or Greenish brown later matures to dark brown or nearly black
  • Other facts: Dominant forest tree through the state that grows to about 90' tall.
  • Many birds and mammals like dear, and bear eat its acorns.
  • Hard, strong wood used for furniture, veneer, and flooring.

Douglass Fir:
  • Leaves: Evergreen needles, grow in clusters of 2, slender. Snap easily when bent double.
  • Fruit: A cone, about 2" long, no prickles, remains attached until the following year
  • Smooth and reddish brown
  • Medium sized tree. Valuable timber tree in northern part of state, the wood is used for construction lumber.
  • Chipmunks, Songbirds, and mice feed on the seeds.